package com.itstu.gulimall.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.fasterxml.jackson.databind.annotation.JsonAppend;
import com.itstu.common.constant.AuthServerConstant;
import com.itstu.common.exception.BizCodeEnume;
import com.itstu.common.utils.R;
import com.itstu.common.vo.MemberResponVo;
import com.itstu.gulimall.auth.feign.MemberFeignService;
import com.itstu.gulimall.auth.feign.ThirdPartFeignService;
import com.itstu.gulimall.auth.vo.UserLoginVo;
import com.itstu.gulimall.auth.vo.UserRegistVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.util.StringUtils;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;
import org.yaml.snakeyaml.events.Event;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import javax.validation.constraints.NotEmpty;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * @author shhjiang_001
 * @create 2020-05-28 20:46
 */
@Controller
public class LoginController {
    @Autowired
    ThirdPartFeignService thirdPartFeignService;
    @Autowired
    StringRedisTemplate redisTemplate;
    @Autowired
    MemberFeignService memberFeignService;

    @GetMapping("/sms/sendcode")
    @ResponseBody
    public R sendCode(@RequestParam("phone") String phone){
        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (!StringUtils.isEmpty(redisCode)){
            // 使用redis缓存验证码，防止同一个phone在60秒内再次发送验证码
            long l = Long.parseLong(redisCode.split("_")[1]);
            if (System.currentTimeMillis()-l < 60000){
                return R.error(BizCodeEnume.SMS_CODE_EXCEPTION.getCode(),BizCodeEnume.SMS_CODE_EXCEPTION.getMsg());
            }
        }
        // 接口防刷
        // 验证码的再次校验，redis
        String code = UUID.randomUUID().toString().substring(0, 5)+"_"+System.currentTimeMillis();
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX+phone,code,10, TimeUnit.MINUTES);
        // TODO 此处出现重复调用问题，可能设置的超时时间过小导致的
        thirdPartFeignService.sendCode(phone,code.substring(0,5));
        return R.ok();
    }

    /**
     * // TODO 重定向携带的数据，利用session的原理，将数据放在session中，
     * 只要跳到下一个页面取出数据，session中的数据就会被删掉
     * @param vo
     * @param result
     * @param redirectAttributes
     * @return
     */
    @PostMapping("/regist")
    public String regist(@Valid UserRegistVo vo, BindingResult result, /*Model model*/RedirectAttributes redirectAttributes){
        if (result.hasErrors()){
            // 校验出错，转发到注册页
            Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));
//            model.addAttribute("errors",errors);
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.gulimall.com/reg.html";
        }
        // 1. 校验验证码
        String code = vo.getCode();
        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if (!StringUtils.isEmpty(s)){
            if (code.equals(s.split("_")[0])){
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
                // 真正注册，调用远程服务进行注册
                R regist = memberFeignService.regist(vo);
                if (regist.getCode() == 0 ){
                    // 成功
                    return "redirect:http://auth.gulimall.com/login.html";
                }else {
                    Map<String, String> errors = new HashMap<>();
                    errors.put("msg",regist.getData("msg",new TypeReference<String>(){}));
                    redirectAttributes.addFlashAttribute("errors",errors);
                    return "redirect:http://auth.gulimall.com/reg.html";
                }
            }else {
                Map<String, String> errors = new HashMap<>();
                errors.put("code","验证码错误");
                redirectAttributes.addFlashAttribute("errors",errors);
                return "redirect:http://auth.gulimall.com/reg.html";
            }
        }else {
            Map<String, String> errors = new HashMap<>();
            errors.put("code","验证码错误");
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.gulimall.com/reg.html";
        }

    }

    @GetMapping("/login.html")
    public String loginPage(HttpSession session){
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if (attribute == null){
            // 没登录
            return "login";
        }else {
            return "redirect:http://gulimall.com";
        }
    }

    // 不使用@RequestBody注解时，
    // 可以接收Content-Type为application/x-www-form-urlencoded类型的请求所提交的数据，
    // 数据格式：aaa=111$bbb=222。form表单提交以及jQuery的$.post()方法所发送的请求就是这种类型。
    //
    //使用@RequestBody注解时，
    // 用于接收Content-Type为application/json类型的请求,
    // 数据类型是JSON：{"aaa":"111","bbb":"222"}
    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes, HttpSession session){
        // 远程登陆
        R login = memberFeignService.login(vo);
        if (login.getCode() == 0){
            // 成功
            MemberResponVo data = login.getData("data", new TypeReference<MemberResponVo>() {
            });
            session.setAttribute(AuthServerConstant.LOGIN_USER,data);
            return "redirect:http://gulimall.com";
        }else{
            Map<String, String> errors = new HashMap<>();
            errors.put("msg",login.getData("msg",new TypeReference<String>(){}));
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.gulimall.com/login.html";
        }
    }
}
